/*-
 * #%L
 * This file is part of "Apromore Community".
 * 
 * Copyright (C) 2014 - 2017 Queensland University of Technology.
 * %%
 * Copyright (C) 2018 - 2020 Apromore Pty Ltd.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
 * #L%
 */

package org.apromore.filestore.webdav.methods;

import org.apromore.filestore.webdav.StoredObject;

public abstract class DeterminableMethod extends AbstractMethod {

    private static final String NULL_RESOURCE_METHODS_ALLOWED = "OPTIONS, MKCOL, PUT, PROPFIND, LOCK, UNLOCK";
    private static final String RESOURCE_METHODS_ALLOWED = "OPTIONS, GET, HEAD, POST, DELETE, TRACE" + ", PROPPATCH, COPY, MOVE, LOCK, UNLOCK, PROPFIND";
    private static final String FOLDER_METHOD_ALLOWED = ", PUT";
    private static final String LESS_ALLOWED_METHODS = "OPTIONS, MKCOL, PUT";

    /**
     * Determines the methods normally allowed for the resource.
     * 
     * @param so StoredObject representing the resource
     * @return all allowed methods, separated by commas
     */
    protected static String determineMethodsAllowed(StoredObject so) {
        try {
            if (so != null) {
                if (so.isNullResource()) {
                    return NULL_RESOURCE_METHODS_ALLOWED;
                } else if (so.isFolder()) {
                    return RESOURCE_METHODS_ALLOWED + FOLDER_METHOD_ALLOWED;
                }
                return RESOURCE_METHODS_ALLOWED;
            }
        } catch (Exception e) {
        }

        return LESS_ALLOWED_METHODS;
    }

}
